diff --git a/python/paddle/fluid/layers/tensor.py b/python/paddle/fluid/layers/tensor.py
index b7a8bff30d3baffb7ec4d67a9bf6f5b00e3aa983..2a4fcf8ac18bbd441b6dc97be6d85cf87a2c5677 100644
--- a/python/paddle/fluid/layers/tensor.py
+++ b/python/paddle/fluid/layers/tensor.py
@@ -230,11 +230,11 @@ def sums(input, out=None):
     helper = LayerHelper('sum', **locals())
     if out is None:
         out = helper.create_tmp_variable(dtype=helper.input_dtype())
-        helper.append_op(
-            type='sum',
-            inputs={'X': input},
-            outputs={'Out': out},
-            attrs={'use_mkldnn': False})
+    helper.append_op(
+        type='sum',
+        inputs={'X': input},
+        outputs={'Out': out},
+        attrs={'use_mkldnn': False})
     return out